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Influence of dominant wind patterns in a distal region of the NW Iberian Margin during the last glaciation

View ORCID ProfileMaria Virgínia Alves Martins, Daniel Rey, Egberto Pereira, Maider Plaza-Morlote, Emília Salgueiro, João Moreno, Wânia Duleba, View ORCID ProfileSara Ribeiro, View ORCID ProfileJosé Francisco dos Santos, Ulisses Dardon, Ana Bernabeu, Belén Rubio, Lazaro Luiz Mattos Laut, Fabrizio Frontalini, Maria Antonieta da Conceição Rodrigues and View ORCID ProfileFernando Rocha
Journal of the Geological Society, 175, 321-335, 21 November 2017, https://doi.org/10.1144/jgs2017-075
Maria Virgínia Alves Martins
1Universidade do Estado do Rio de Janeiro, Av. São Francisco Xavier, 524, Maracanã. CEP 20550-013, Rio de Janeiro, RJ, Brazil
2GeoBioTec, Dpto. Geociências, Universidade de Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
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  • ORCID record for Maria Virgínia Alves Martins
  • For correspondence: virginia.martins@ua.pt
Daniel Rey
3GEOMA, Dpto. Geociencias Marinas y O.T., Universidad de Vigo, Spain
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Egberto Pereira
1Universidade do Estado do Rio de Janeiro, Av. São Francisco Xavier, 524, Maracanã. CEP 20550-013, Rio de Janeiro, RJ, Brazil
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Maider Plaza-Morlote
3GEOMA, Dpto. Geociencias Marinas y O.T., Universidad de Vigo, Spain
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Emília Salgueiro
4Div. Geologia e Georecursos Marinhos, Instituto Português do Mar e da Atmosfera (IPMA), Av. Brasília, 6, 1449-006, Lisboa, Portugal
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João Moreno
5Instituto Dom Luiz (IDL), Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal
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Wânia Duleba
6Escola de Artes Ciências e Humanidades, Universidade de São Paulo, Brazil
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Sara Ribeiro
2GeoBioTec, Dpto. Geociências, Universidade de Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
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  • ORCID record for Sara Ribeiro
José Francisco dos Santos
2GeoBioTec, Dpto. Geociências, Universidade de Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
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  • ORCID record for José Francisco dos Santos
Ulisses Dardon
1Universidade do Estado do Rio de Janeiro, Av. São Francisco Xavier, 524, Maracanã. CEP 20550-013, Rio de Janeiro, RJ, Brazil
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Ana Bernabeu
3GEOMA, Dpto. Geociencias Marinas y O.T., Universidad de Vigo, Spain
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Belén Rubio
3GEOMA, Dpto. Geociencias Marinas y O.T., Universidad de Vigo, Spain
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Lazaro Luiz Mattos Laut
7Universidade Federal do Estado do Rio de Janeiro (UNIRIO), Laboratório de Micropaleontologia – LABMICRO, Av. Pasteur 458, s. 500, Urca, Rio de Janeiro, RJ, Brazil, CEP 22290-240
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Fabrizio Frontalini
8Dipartimento di Scienze Pure e Applicate (DiSPeA) Università degli Studi di Urbino "Carlo Bo", Campus Scientifico Enrico Mattei, Località Crocicchia, 61029 Urbino, Italy
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Maria Antonieta da Conceição Rodrigues
1Universidade do Estado do Rio de Janeiro, Av. São Francisco Xavier, 524, Maracanã. CEP 20550-013, Rio de Janeiro, RJ, Brazil
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Fernando Rocha
2GeoBioTec, Dpto. Geociências, Universidade de Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
9RISCO, Dpto. Engenharia Civil, Universidade de Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
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Abstract

This work combines planktonic foraminiferal assemblages, stable isotope, transfer function estimated sea surface paleotemperatures (SST) and export productivity (Pexp) with sedimentological records from the PC7 core to document paleoclimatic and paleoceanographic changes on a distal region of the NW Iberian Margin since the last glaciation (<≈68 ka). Neodymium and strontium isotope data are also used to identify the provenance of ice rafted debris (IRD) during Heinrich event 5 (H5). Our results are compared and combined with previously published records and evidence that melt water and icebergs from the Canada, Greenland, Iceland and Europe ice sheets arrived to the NW Iberian Margin causing a significant decrease of SST during the last six Heinrich Stadials (HS) and some Dansgaard–Oeschger (D-O) stadial events. εNd and 87Sr/86Sr indicate that the studied locality mostly received sediments from European Ice Sheets (EIS) during H5. During the HS and D–O stadial events, SSTs were in general higher than in other cores collected in inner areas of the NW Iberian Margin. The presence and intensification of Portugal Current probably induced heat transfer to this distal region of the Iberian Margin. Our results also suggest the occurrence of high variability in the intensity and wind patterns during the last glaciation. In some periods, the intensity of northerly winds could have been very strong and contributed to a significant stimulation of ocean productivity in this distal area through the intensification of upwelling. In general, oceanic productivity decreased during the HS and D–O as the presence of cold and less saline water prevented nutrient rich waters from deep levels reaching the surface. The high productivity events were bracketed by periods characterized by the highest influence of the Azores Current eastern branch during which northerly winds and the oceanic productivity should have been weakened.

Supplementary material: Geochemical and foraminiferal data analysed in this work as well as Pearson Correlations between the analysed data are available at https://doi.org/10.6084/m9.figshare.c.3931813

  • © 2018 The Author(s)
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Journal of the Geological Society: 175 (2)
Journal of the Geological Society
Volume 175, Issue 2
March 2018
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Influence of dominant wind patterns in a distal region of the NW Iberian Margin during the last glaciation

Maria Virgínia Alves Martins, Daniel Rey, Egberto Pereira, Maider Plaza-Morlote, Emília Salgueiro, João Moreno, Wânia Duleba, Sara Ribeiro, José Francisco dos Santos, Ulisses Dardon, Ana Bernabeu, Belén Rubio, Lazaro Luiz Mattos Laut, Fabrizio Frontalini, Maria Antonieta da Conceição Rodrigues and Fernando Rocha
Journal of the Geological Society, 175, 321-335, 21 November 2017, https://doi.org/10.1144/jgs2017-075
Maria Virgínia Alves Martins
1Universidade do Estado do Rio de Janeiro, Av. São Francisco Xavier, 524, Maracanã. CEP 20550-013, Rio de Janeiro, RJ, Brazil
2GeoBioTec, Dpto. Geociências, Universidade de Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
  • ORCID record for Maria Virgínia Alves Martins
  • For correspondence: virginia.martins@ua.pt
Daniel Rey
3GEOMA, Dpto. Geociencias Marinas y O.T., Universidad de Vigo, Spain
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Egberto Pereira
1Universidade do Estado do Rio de Janeiro, Av. São Francisco Xavier, 524, Maracanã. CEP 20550-013, Rio de Janeiro, RJ, Brazil
  • Find this author on Google Scholar
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Maider Plaza-Morlote
3GEOMA, Dpto. Geociencias Marinas y O.T., Universidad de Vigo, Spain
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Emília Salgueiro
4Div. Geologia e Georecursos Marinhos, Instituto Português do Mar e da Atmosfera (IPMA), Av. Brasília, 6, 1449-006, Lisboa, Portugal
  • Find this author on Google Scholar
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  • Search for this author on this site
João Moreno
5Instituto Dom Luiz (IDL), Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal
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Wânia Duleba
6Escola de Artes Ciências e Humanidades, Universidade de São Paulo, Brazil
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Sara Ribeiro
2GeoBioTec, Dpto. Geociências, Universidade de Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
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  • Search for this author on this site
  • ORCID record for Sara Ribeiro
José Francisco dos Santos
2GeoBioTec, Dpto. Geociências, Universidade de Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
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  • ORCID record for José Francisco dos Santos
Ulisses Dardon
1Universidade do Estado do Rio de Janeiro, Av. São Francisco Xavier, 524, Maracanã. CEP 20550-013, Rio de Janeiro, RJ, Brazil
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Ana Bernabeu
3GEOMA, Dpto. Geociencias Marinas y O.T., Universidad de Vigo, Spain
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Belén Rubio
3GEOMA, Dpto. Geociencias Marinas y O.T., Universidad de Vigo, Spain
  • Find this author on Google Scholar
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  • Search for this author on this site
Lazaro Luiz Mattos Laut
7Universidade Federal do Estado do Rio de Janeiro (UNIRIO), Laboratório de Micropaleontologia – LABMICRO, Av. Pasteur 458, s. 500, Urca, Rio de Janeiro, RJ, Brazil, CEP 22290-240
  • Find this author on Google Scholar
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  • Search for this author on this site
Fabrizio Frontalini
8Dipartimento di Scienze Pure e Applicate (DiSPeA) Università degli Studi di Urbino "Carlo Bo", Campus Scientifico Enrico Mattei, Località Crocicchia, 61029 Urbino, Italy
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  • Search for this author on this site
Maria Antonieta da Conceição Rodrigues
1Universidade do Estado do Rio de Janeiro, Av. São Francisco Xavier, 524, Maracanã. CEP 20550-013, Rio de Janeiro, RJ, Brazil
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Fernando Rocha
2GeoBioTec, Dpto. Geociências, Universidade de Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
9RISCO, Dpto. Engenharia Civil, Universidade de Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
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  • ORCID record for Fernando Rocha

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Influence of dominant wind patterns in a distal region of the NW Iberian Margin during the last glaciation

Maria Virgínia Alves Martins, Daniel Rey, Egberto Pereira, Maider Plaza-Morlote, Emília Salgueiro, João Moreno, Wânia Duleba, Sara Ribeiro, José Francisco dos Santos, Ulisses Dardon, Ana Bernabeu, Belén Rubio, Lazaro Luiz Mattos Laut, Fabrizio Frontalini, Maria Antonieta da Conceição Rodrigues and Fernando Rocha
Journal of the Geological Society, 175, 321-335, 21 November 2017, https://doi.org/10.1144/jgs2017-075
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